A. Nurkhin, K. Kardoyo, H. Pramusinto, R. Setiyani, and R. Widhiastuti, “Applying Blended Problem-Based Learning to Accounting Studies in Higher Education; Optimizing the Utilization of Social Media for Learning”, Int. J. Emerg. Technol. Learn., vol. 15, no. 08, pp. pp. 22–39, Apr. 2020.